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2006-06-18 18:10:03 by steve

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Updated to work with LVM properly!
This commit is contained in:
steve
2006-06-18 18:10:03 +00:00
parent 4b28289bb1
commit 9419b47ed5
1 changed files with 85 additions and 44 deletions
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129
bin/xen-update-image
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@@ -15,7 +15,7 @@ xen-update-image - Update the software installed upon offline Xen images.
General Options:
--dir Specify the directory which contains the image(s).
--volume Specify the LVM volume which contains the image(s).
--lvm Specify the LVM volume group which contains the image(s).
=cut
@@ -29,16 +29,16 @@ xen-update-image - Update the software installed upon offline Xen images.
Specify the directory which contains the image(s).
=item B<--help>
Show the script help
Show the script help.
=item B<--manual>
Read the manual
Read the manual.
=item B<--version>
Show the version number and exit.
=item B<--volume>
Specify the LVM volume where images are located.
=item B<--lvm>
Specify the LVM volume group which contains the image(s).
=back
@@ -57,7 +57,7 @@ Specify the LVM volume where images are located.
apt-get upgrade
If the image is already running within Xen this will cause corruption
B<NOTE> If the image is already running within Xen this will cause corruption
otherwise it will allow you to update your image without booting it.
=cut
@@ -70,7 +70,6 @@ Specify the LVM volume where images are located.
Updating both images can be accomplished by executing:
xen-update-images --dir=/home/xen test.my.flat x11.my.flat
=cut
@@ -83,7 +82,7 @@ Specify the LVM volume where images are located.
--
http://www.steve.org.uk/
$Id: xen-update-image,v 1.3 2006-06-13 13:21:22 steve Exp $
$Id: xen-update-image,v 1.4 2006-06-18 18:10:03 steve Exp $
=cut
@@ -138,23 +137,9 @@ parseCommandLineArguments();
#
# Make sure we have either a volume, or a root.
# Test that our arguments are sane.
#
if ( $CONFIG{'volume'} && $CONFIG{'dir'} )
{
print "Please only use a volume or a directory name - not both\n";
exit;
}
#
# Volumes are not supported yet :(
#
if ( $CONFIG{'volume'} )
{
print "LVM Volumes are not supported yet\n";
exit;
}
checkArguments();
#
@@ -166,7 +151,7 @@ if ( $EFFECTIVE_USER_ID != 0 )
This script is not running with root privileges.
root privileges are required to successfully mount the disk images.
root privileges are required to successfully mount the disk image(s).
E_O_ROOT
@@ -193,7 +178,7 @@ exit;
=head2 updateXenImage
Actually perform the updates of the relevant image.
Mount the primary disk image, so that we're ready to update it.
=cut
@@ -201,31 +186,57 @@ sub updateXenImage
{
my ( $name ) = ( @_ );
#
# Find the disk image.
#
my $image = $CONFIG{'dir'} . "/domains/" . $name . "/disk.img";
if ( ! -e $image )
{
print "Disk image '$image' for host '$name' not found\n";
exit;
}
#
# Create a temporary directory to mount the image upon securely.
# Create a temporary directory, and prepare to mount the
# image there.
#
my $tmp = tempdir( CLEANUP => 1 );
my $mount_cmd = "mount -t auto -o loop $image $tmp";
my $img = '';
#
# If we're dealing with loopback images find the main one,
# and mount it.
#
if ( $CONFIG{'dir'} )
{
# The loopback image.
$img = $CONFIG{'dir'} . "/domains/" . $name . "/disk.img";
if ( ! -e $img )
{
print "Disk image '$img' for host '$name' not found\n";
return;
}
}
elsif ( $CONFIG{'lvm'} )
{
# The LVM volume
$img = "/dev/" . $CONFIG{'lvm'} . "/$name-disk";
# make sure it exists.
if ( ! -e $img )
{
print "Logical volume '$img' for host '$name' not found\n";
return;
}
}
else
{
die "Can't happen?\n";
}
#
# Mount the image.
#
my $mount_cmd = "mount -t auto -o loop $img $tmp";
`$mount_cmd`;
#
# Make sure this is a Debian image.
#
if ( ( -e $tmp . "/usr/bin/apt-get" ) &&
( -e $tmp . "/etc/apt/sources.list" ) )
( -e $tmp . "/etc/apt/sources.list" ) )
{
#
# Now run the update command.
@@ -326,7 +337,7 @@ sub parseCommandLineArguments
#
GetOptions(
"dir=s", \$CONFIG{'dir'},
"volume=s", \$CONFIG{'volume'},
"lvm=s", \$CONFIG{'lvm'},
"help", \$HELP,
"manual", \$MANUAL,
"version", \$VERSION
@@ -337,7 +348,7 @@ sub parseCommandLineArguments
if ( $VERSION )
{
my $REVISION = '$Revision: 1.3 $';
my $REVISION = '$Revision: 1.4 $';
if ( $REVISION =~ /1.([0-9.]+) / )
{
@@ -350,3 +361,33 @@ sub parseCommandLineArguments
}
=head2 checkArguments
Test that the options we received from the command line, or our
configuration file, make sense.
=cut
sub checkArguments
{
#
# Make sure we have either a volume, or a root.
#
if ( $CONFIG{'lvm'} && $CONFIG{'dir'} )
{
print "Please only specify a volume group or a directory name - not both\n";
exit;
}
#
# Make sure we have at least one of the lvm or root specified.
#
if ( (!defined( $CONFIG{'dir'} ) ) && ( !defined( $CONFIG{'lvm'} ) ) )
{
print "Please specify either a directory root, or an LVM volume group\n";
exit;
}
}